You do understand that as a supposed impartial, bi-partisan committee leader of the current investigation into these matters, that making this call:
but it has nothing to do with the Russian investigation
... when clearly it's about Trump, and about foreign governments (scrubbed), is your error, and his error (if he made an error and did not do this intentionally to run cover for the WH, which seems far more likely.
The determination of whether or not its relevant is the subject of the investigation, which he would have the committee ranking D at least, if not the entire committee, hear that information, and they could conclude as a committee on its relevance.
That of course, didn't happen. So because you can't defend that, and its by the way Nunes did this, indefensible, you have no case to make.